NetBSD/sys/dev/pci/if_ex_pci.c

/*	$NetBSD: if_ex_pci.c,v 1.52 2010/03/22 17:20:42 dyoung Exp $	*/

/*-
 * Copyright (c) 1998 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Frank van der Linden; Jason R. Thorpe of the Numerical Aerospace
 * Simulation Facility, NASA Ames Research Center.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: if_ex_pci.c,v 1.52 2010/03/22 17:20:42 dyoung Exp $");

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/mbuf.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <sys/errno.h>
#include <sys/syslog.h>
#include <sys/select.h>
#include <sys/device.h>

#include <net/if.h>
#include <net/if_dl.h>
#include <net/if_ether.h>
#include <net/if_media.h>

#include <sys/cpu.h>
#include <sys/bus.h>
#include <sys/intr.h>

#include <dev/mii/miivar.h>
#include <dev/mii/mii.h>

#include <dev/ic/elink3var.h>
#include <dev/ic/elink3reg.h>
#include <dev/ic/elinkxlreg.h>
#include <dev/ic/elinkxlvar.h>

#include <dev/pci/pcivar.h>
#include <dev/pci/pcireg.h>
#include <dev/pci/pcidevs.h>

struct ex_pci_softc {
	struct ex_softc sc_ex;

	/* PCI function status space. 556,556B requests it. */
	bus_space_tag_t sc_funct;
	bus_space_handle_t sc_funch;

	pci_chipset_tag_t psc_pc;	/* pci chipset tag */
	pcireg_t psc_regs[0x40>>2];	/* saved PCI config regs (sparse) */
	pcitag_t psc_tag;		/* pci device tag */
};

/*
 * PCI constants.
 * XXX These should be in a common file!
 */
#define PCI_CONN		0x48    /* Connector type */
#define PCI_CBIO		0x10    /* Configuration Base IO Address */
#define PCI_POWERCTL		0xe0
#define PCI_FUNCMEM		0x18

#define PCI_INTR		4
#define PCI_INTRACK		0x00008000

static int	ex_pci_match(device_t, cfdata_t, void *);
static void	ex_pci_attach(device_t, device_t, void *);
static void	ex_pci_intr_ack(struct ex_softc *);

static int	ex_pci_enable(struct ex_softc *);

static void	ex_pci_confreg_restore(struct ex_pci_softc *);
static int	ex_d3tod0(pci_chipset_tag_t, pcitag_t, device_t, pcireg_t);

CFATTACH_DECL_NEW(ex_pci, sizeof(struct ex_pci_softc),
    ex_pci_match, ex_pci_attach, NULL, NULL);

static const struct ex_pci_product {
	uint32_t	epp_prodid;	/* PCI product ID */
	int		epp_flags;	/* initial softc flags */
	const char	*epp_name;	/* device name */
} ex_pci_products[] = {
	{ PCI_PRODUCT_3COM_3C900TPO,	0,
	  "3c900-TPO Ethernet" },
	{ PCI_PRODUCT_3COM_3C900COMBO,	0,
	  "3c900-COMBO Ethernet" },

	{ PCI_PRODUCT_3COM_3C905TX,	EX_CONF_MII,
	  "3c905-TX 10/100 Ethernet" },
	{ PCI_PRODUCT_3COM_3C905T4,	EX_CONF_MII,
	  "3c905-T4 10/100 Ethernet" },

	{ PCI_PRODUCT_3COM_3C900BTPO,	EX_CONF_90XB,
	  "3c900B-TPO Ethernet" },
	{ PCI_PRODUCT_3COM_3C900BCOMBO,	EX_CONF_90XB,
	  "3c900B-COMBO Ethernet" },
	{ PCI_PRODUCT_3COM_3C900BTPC,   EX_CONF_90XB,
	  "3c900B-TPC Ethernet" },

	{ PCI_PRODUCT_3COM_3C905BTX,	EX_CONF_90XB|EX_CONF_MII|EX_CONF_INTPHY,
	  "3c905B-TX 10/100 Ethernet" },
	{ PCI_PRODUCT_3COM_3C905BT4,	EX_CONF_90XB|EX_CONF_MII,
	  "3c905B-T4 10/100 Ethernet" },
	{ PCI_PRODUCT_3COM_3C905BCOMBO,	EX_CONF_90XB/*|EX_CONF_MII|EX_CONF_INTPHY*/,
	  "3c905B-COMBO 10/100 Ethernet" },
	{ PCI_PRODUCT_3COM_3C905BFX,	EX_CONF_90XB,
	  "3c905B-FX 10/100 Ethernet" },

	/* XXX Internal PHY? */
	{ PCI_PRODUCT_3COM_3C980SRV,	EX_CONF_90XB,
	  "3c980 Server Adapter 10/100 Ethernet" },
	{ PCI_PRODUCT_3COM_3C980CTXM,	EX_CONF_90XB|EX_CONF_MII,
	  "3c980C-TXM 10/100 Ethernet" },

	{ PCI_PRODUCT_3COM_3C905CTX,	EX_CONF_90XB|EX_CONF_MII,
	  "3c905C-TX 10/100 Ethernet with mngmt" },

	{ PCI_PRODUCT_3COM_3C450TX,		EX_CONF_90XB,
	  "3c450-TX 10/100 Ethernet" },

	{ PCI_PRODUCT_3COM_3CSOHO100TX,	EX_CONF_90XB,
	  "3cSOHO100-TX 10/100 Ethernet" },

	{ PCI_PRODUCT_3COM_3C555,
	   EX_CONF_90XB | EX_CONF_MII | EX_CONF_EEPROM_OFF |
	   EX_CONF_EEPROM_8BIT,
	  "3c555 MiniPCI 10/100 Ethernet" },

	{ PCI_PRODUCT_3COM_3C556,
	   EX_CONF_90XB | EX_CONF_MII | EX_CONF_EEPROM_OFF |
	   EX_CONF_PCI_FUNCREG | EX_CONF_RESETHACK | EX_CONF_INV_LED_POLARITY |
	   EX_CONF_PHY_POWER | EX_CONF_EEPROM_8BIT,
	  "3c556 MiniPCI 10/100 Ethernet" },

	{ PCI_PRODUCT_3COM_3C556B,
	   EX_CONF_90XB | EX_CONF_MII | EX_CONF_EEPROM_OFF |
	   EX_CONF_PCI_FUNCREG | EX_CONF_RESETHACK | EX_CONF_INV_LED_POLARITY |
	   EX_CONF_PHY_POWER | EX_CONF_NO_XCVR_PWR,
	  "3c556B MiniPCI 10/100 Ethernet" },

	{ PCI_PRODUCT_3COM_3C905CXTX,	EX_CONF_90XB|EX_CONF_MII,
	  "3c905CX-TX 10/100 Ethernet with mngmt" },

	{ PCI_PRODUCT_3COM_3C920BEMBW,	EX_CONF_90XB|EX_CONF_MII,
	  "3c920B-EMB-WNM Integrated Fast Ethernet" },

	{ 0,				0,
	  NULL },
};

static const struct ex_pci_product *
ex_pci_lookup(const struct pci_attach_args *pa)
{
	const struct ex_pci_product *epp;

	if (PCI_VENDOR(pa->pa_id) != PCI_VENDOR_3COM)
		return (NULL);

	for (epp = ex_pci_products; epp->epp_name != NULL; epp++)
		if (PCI_PRODUCT(pa->pa_id) == epp->epp_prodid)
			return (epp);
	return (NULL);
}

static int
ex_pci_match(device_t parent, cfdata_t match,
    void *aux)
{
	struct pci_attach_args *pa = (struct pci_attach_args *) aux;

	if (ex_pci_lookup(pa) != NULL)
		return (2);	/* beat ep_pci */

	return (0);
}

static void
ex_pci_attach(device_t parent, device_t self, void *aux)
{
	struct ex_pci_softc *psc = device_private(self);
	struct ex_softc *sc = &psc->sc_ex;
	struct pci_attach_args *pa = aux;
	pci_chipset_tag_t pc = pa->pa_pc;
	pci_intr_handle_t ih;
	const struct ex_pci_product *epp;
	const char *intrstr = NULL;
	int rev;
	int error;

	aprint_naive(": Ethernet controller\n");

	sc->sc_dev = self;

	if (pci_mapreg_map(pa, PCI_CBIO, PCI_MAPREG_TYPE_IO, 0,
	    &sc->sc_iot, &sc->sc_ioh, NULL, NULL)) {
		aprint_error(": can't map i/o space\n");
		return;
	}

	epp = ex_pci_lookup(pa);
	if (epp == NULL) {
		printf("\n");
		panic("ex_pci_attach: impossible");
	}

	rev = PCI_REVISION(pci_conf_read(pc, pa->pa_tag, PCI_CLASS_REG));
	aprint_normal(": 3Com %s (rev. 0x%x)\n", epp->epp_name, rev);

	sc->sc_dmat = pa->pa_dmat;

	sc->ex_bustype = EX_BUS_PCI;
	sc->ex_conf = epp->epp_flags;

	/* Enable the card. */
	pci_conf_write(pc, pa->pa_tag, PCI_COMMAND_STATUS_REG,
	    pci_conf_read(pc, pa->pa_tag, PCI_COMMAND_STATUS_REG) |
	    PCI_COMMAND_MASTER_ENABLE);

	psc->psc_pc = pc;
	psc->psc_tag = pa->pa_tag;
	psc->psc_regs[PCI_COMMAND_STATUS_REG>>2] =
	    pci_conf_read(pc, pa->pa_tag, PCI_COMMAND_STATUS_REG);
	psc->psc_regs[PCI_BHLC_REG>>2] =
	    pci_conf_read(pc, pa->pa_tag, PCI_BHLC_REG);
	psc->psc_regs[PCI_CBIO>>2] =
	    pci_conf_read(pc, pa->pa_tag, PCI_CBIO);

	if (sc->ex_conf & EX_CONF_PCI_FUNCREG) {
		/* Map PCI function status window. */
		if (pci_mapreg_map(pa, PCI_FUNCMEM, PCI_MAPREG_TYPE_MEM, 0,
		    &psc->sc_funct, &psc->sc_funch, NULL, NULL)) {
			aprint_error_dev(self,
			    "unable to map function status window\n");
			return;
		}
		sc->intr_ack = ex_pci_intr_ack;

		psc->psc_regs[PCI_FUNCMEM>>2] =
		    pci_conf_read(pc, pa->pa_tag, PCI_FUNCMEM);
	}

	psc->psc_regs[PCI_INTERRUPT_REG>>2] =
	    pci_conf_read(pc, pa->pa_tag, PCI_INTERRUPT_REG);
	/* power up chip */
	error = pci_activate(pa->pa_pc, pa->pa_tag, self, ex_d3tod0);
	switch (error) {
	case EOPNOTSUPP:
		break;
	case 0: 
		sc->enable = ex_pci_enable;
		sc->disable = NULL;
		break;
	default:
		aprint_error_dev(self, "cannot activate %d\n", error);
		return;
	}
	sc->enabled = 1;

	/* Map and establish the interrupt. */
	if (pci_intr_map(pa, &ih)) {
		aprint_error_dev(self, "couldn't map interrupt\n");
		return;
	}

	intrstr = pci_intr_string(pc, ih);
	sc->sc_ih = pci_intr_establish(pc, ih, IPL_NET, ex_intr, sc);
	if (sc->sc_ih == NULL) {
		aprint_error_dev(self, "couldn't establish interrupt");
		if (intrstr != NULL)
			aprint_error(" at %s", intrstr);
		aprint_error("\n");
		return;
	}
	aprint_normal_dev(self, "interrupting at %s\n", intrstr);

	ex_config(sc);

	if (sc->ex_conf & EX_CONF_PCI_FUNCREG)
		bus_space_write_4(psc->sc_funct, psc->sc_funch, PCI_INTR,
		    PCI_INTRACK);

	if (sc->disable != NULL)
		ex_disable(sc);
}

static void
ex_pci_intr_ack(struct ex_softc *sc)
{
	struct ex_pci_softc *psc = (struct ex_pci_softc *)sc;

	bus_space_write_4(psc->sc_funct, psc->sc_funch, PCI_INTR,
	    PCI_INTRACK);
}

static int
ex_d3tod0(pci_chipset_tag_t pc, pcitag_t tag, device_t self, pcireg_t state)
{

#define PCI_CACHE_LAT_BIST	0x0c
#define PCI_EXP_ROM_BAR		0x30
#define PCI_INT_GNT_LAT		0x3c

	uint32_t base0;
	uint32_t base1;
	uint32_t romaddr;
	uint32_t pci_command;
	uint32_t pci_int_lat;
	uint32_t pci_cache_lat;

	if (state != PCI_PMCSR_STATE_D3)
		return 0;

	aprint_normal_dev(self, "found in power state D%d, "
	    "attempting to recover.\n", state);
	pci_command = pci_conf_read(pc, tag, PCI_COMMAND_STATUS_REG);
	base0 = pci_conf_read(pc, tag, PCI_BAR0);
	base1 = pci_conf_read(pc, tag, PCI_BAR1);
	romaddr	= pci_conf_read(pc, tag, PCI_EXP_ROM_BAR);
	pci_cache_lat= pci_conf_read(pc, tag, PCI_CACHE_LAT_BIST);
	pci_int_lat = pci_conf_read(pc, tag, PCI_INT_GNT_LAT);

	pci_conf_write(pc, tag, PCI_POWERCTL, 0);
	pci_conf_write(pc, tag, PCI_BAR0, base0);
	pci_conf_write(pc, tag, PCI_BAR1, base1);
	pci_conf_write(pc, tag, PCI_EXP_ROM_BAR, romaddr);
	pci_conf_write(pc, tag, PCI_INT_GNT_LAT, pci_int_lat);
	pci_conf_write(pc, tag, PCI_CACHE_LAT_BIST, pci_cache_lat);
	pci_conf_write(pc, tag, PCI_COMMAND_STATUS_REG,
	    (PCI_COMMAND_MASTER_ENABLE | PCI_COMMAND_IO_ENABLE));
	aprint_normal_dev(self, "changed power state to D0.\n");
	return 0;
}

static void
ex_pci_confreg_restore(struct ex_pci_softc *psc)
{
	struct ex_softc *sc = (void *) psc;
	pcireg_t reg;

	reg = pci_conf_read(psc->psc_pc, psc->psc_tag, PCI_COMMAND_STATUS_REG);

	pci_conf_write(psc->psc_pc, psc->psc_tag,
	    PCI_COMMAND_STATUS_REG,
	    (reg & 0xffff0000) |
	    (psc->psc_regs[PCI_COMMAND_STATUS_REG>>2] & 0xffff));
	pci_conf_write(psc->psc_pc, psc->psc_tag, PCI_BHLC_REG,
	    psc->psc_regs[PCI_BHLC_REG>>2]);
	pci_conf_write(psc->psc_pc, psc->psc_tag, PCI_CBIO,
	    psc->psc_regs[PCI_CBIO>>2]);
	if (sc->ex_conf & EX_CONF_PCI_FUNCREG)
		pci_conf_write(psc->psc_pc, psc->psc_tag, PCI_FUNCMEM,
		    psc->psc_regs[PCI_FUNCMEM>>2]);
	pci_conf_write(psc->psc_pc, psc->psc_tag, PCI_INTERRUPT_REG,
	    psc->psc_regs[PCI_INTERRUPT_REG>>2]);
}

static int
ex_pci_enable(struct ex_softc *sc)
{
	struct ex_pci_softc *psc = (void *) sc;

	aprint_debug_dev(sc->sc_dev, "going to power state D0\n");

	/* Now restore the configuration registers. */
	ex_pci_confreg_restore(psc);

	return (0);
}